The weight difference between the Daniel Defense v5 Lightweight and a standard M4 was immediately noticeable, nearly 10 ounces. That's a lot of weight if you have to work an operation for hours. The standard M4 has a short carbine railed forearm compared to the 12-inch mid length of the v5 Lightweight.

Colt Defense LLC has introduced the Colt Super-Stoc buttstock, which will be standard issue on select Colt AR and M4 rifles sold to law enforcement. The new Colt Super-Stoc will be available later this month.

A typical two-day pistol-carbine course splits off one day for handgun and a second for carbine. At Redback One, the handgun or long gun are operated as the scenario dictated. This is done, because training director Jason Falla believes your primary weapon is your long gun.

SIG Sauer has introduced the SIG M400 tactical carbine, an improved version of its 5.56x45mm military issue tactical carbine. The SIG M400 uses a direct-impingement gas system and accepts parts and accessories for the original M4-style carbine.

To show what your carbine can do and to test or improve your skills, LAV uses his 4-10 Drill. This is shooting at four distances — single-position shooting at 100 yards prone, 75 yards seated, 50 yards kneeling and 25 yards standing in 1 minute, 45 seconds, 30 seconds, and 15 seconds. Fire 10 shots at each distance.

ArmaLite will produce a limited run of 6.8mm SPC carbines starting in June, the company has announced. The M-15A4 carbine, which will be chambered for the 6.8 SPC II, is an AR-platform rifle operating with a gas system.

For officers looking to customize their AR-type rifle and make it more ready for duty, there are dozens of ways to configure it the way you like it. In this photo gallery, we show you a few, including free-float rails, collapsible stocks, muzzle brakes and suppressors, trigger guards, foregrips, tools and cleaning kits. For more, read "Accessorizing Your AR."

One of the fastest growing sectors of the law enforcement market is enhancements for the AR Series of firearms. The AR has become the firearms counterpart of Burger King's Whopper: You can have it your way, any way you want it, literally.

Ruger, at the NRA Show 2011, announced the SR-556E carbine, which the company is marketing as a value-priced alternative of the SR-556. Both rifles include the two-stage piston and multi-stage regulator that runs cooler and cleaner than traditional AR-style rifles.

The corporate parent of Winchester announced a recall of six lots of Ranger .223 Remington 64-grain Power-Point rifle ammunition, because it "may contain incorrect propellant," according to a company statement.

The advantage of a semi-auto weapon over a bolt gun is obvious. Follow-up shots are much quicker and the felt recoil is much less. Another advantage of the AR platform .308 weapons system is the familiar layout of the selector, mag release, and charging handle.

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